Another Texas school district has become embroiled in a student-teacher sex scandal, this time involving a pregnant teacher and cheerleading coach and a 15-year-old student in the suburbs of Dallas-Fort Worth.

According to the Trophy Club Police Department, Katherine Ruth Harper, 27, had an improper relationship with a former student. Harper met the student while at a local middle school as a 7th-grade English teacher, cheerleading coach and tennis coach.

An arrest warrant acquired by the Fort Worth Star-Telegram says that the pair exchanged nude photos and had sex multiple times over the summer break.

The arrest warrant notes that the teacher's improper relationship, a 2nd degree felony, began when "the two began sending flirty text messages to each other, which eventually led to her going over to his Trophy Club home."

A female high school teacher turned herself in after a warrant was issued for her arrest for an alleged improper relationship with a male student. Sarah Fowlkes, 27, is suspected of having an inappropriate relationship with a 17-year-old boy at Lockhart High School. Authorities said they determined through interviews that Fowlkes engaged in sexual contact with the student. Fowlkes was suspended and parents notified.